smtpp - Man Page

smtpp [-d] [-l[[@]logfile]] [-pport] [-iinternal_ip] [-eexternal_ip] [-hdefault_ip[:port]]

smtpp is SMTP gateway service to allow internal users to access external SMTP servers.

-I

Inetd mode. Standalone service only.

-d

Daemonize. Detach service from console and run in the background.

-t

Be silenT. Do not log start/stop/accept error records.

-u

Never look for username authentication.

-e

External address. IP address of the interface the proxy should initiate connections from. By default, the system will decide which address to use in accordance with the routing table.

-i

Internal address. IP address the proxy accepts connections to. By default, connections to any interface are accepted. It´s usually unsafe.

-p

Port. Port proxy listens for incoming connections. Default is 25.

-h

Default destination. It's used if the target address is not specified by the user.

-l

Log. By default logging is to stdout. If logfile is specified logging is to file. Under Unix, if ´@´ precedes logfile, syslog is used for logging.

-S

Increase or decrease stack size. You may want to try something like -S8192 if you experience 3proxy crashes.

You can use any MUA (Mail User Agent) with SMTP authentication support. Set the client to use internal_ip and port as an SMTP server. The address of the real SMTP server must be configured as a part of the SMTP username. The format for the username is username@server, where server is the address of the SMTP server and username is the user´s login on this SMTP server. The login itself may contain an ´@´ sign. Only cleartext authentication is supported, because challenge-response authentication (CRAM-MD5, SPA, etc.) requires a challenge from the server before we know which server to connect to.

Report all bugs to 3proxy@3proxy.org

3proxy(8), ftppr(8), htproxy(8), socks(8), tcppm(8), tlspr(8), udppm(8), syslogd(8),
https://3proxy.org/

3proxy is designed by Vladimir 3APA3A Dubrovin (3proxy@3proxy.org)

tlspr(8).